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单词 dendroid
释义

Definition of dendroid in English:

dendroid

adjective ˈdɛndrɔɪdˈdendroid
Biology
  • (of a plant, marine invertebrate, or structure) tree-shaped; branching.

    Example sentencesExamples
    • Many dendroid colonies in lower Paleozoic trepostomes developed narrow exozones of young presumably feeding autozooids in cycles that covered growing branch tips.
    • The tiny conical shells known as dacryoconarids were also abundant and evolving rapidly at this time, but only a few dendroid graptoloids remained from the Silurian faunas.
    • The intermediate-level benthos was dominated by sponges, corals, giant bivalves, giant brachiopods, stalked echinoderms and fixed dendroid graptolites.
    • Further, older autozooids in major proximal regions of some large dendroid colonies stopped growing skeletons outwardly as distal colony growth continued.
    • Subcylindrical forms such as Stachyodes and Amphipora have been called dendroid or twiglike, and aluacerids have been called subcylindrical, cylindrical, or columnar.
nounˈdɛndrɔɪdˈdendroid
  • A graptolite (fossil marine invertebrate) of a type that formed much-branched colonies, found chiefly in the Ordovician and Silurian periods.

    Order Dendroidea, class Graptolithina

    Example sentencesExamples
    • In the Early Ordovician, many-branched planktonic forms developed from the attached dendroids.

Origin

Mid 19th century: from dendro- 'tree' + -oid.

 
 

Definition of dendroid in US English:

dendroid

adjectiveˈdendroid
Biology
  • (of a plant, marine invertebrate, or structure) tree-shaped; arborescent; branching.

    Example sentencesExamples
    • The intermediate-level benthos was dominated by sponges, corals, giant bivalves, giant brachiopods, stalked echinoderms and fixed dendroid graptolites.
    • Many dendroid colonies in lower Paleozoic trepostomes developed narrow exozones of young presumably feeding autozooids in cycles that covered growing branch tips.
    • The tiny conical shells known as dacryoconarids were also abundant and evolving rapidly at this time, but only a few dendroid graptoloids remained from the Silurian faunas.
    • Subcylindrical forms such as Stachyodes and Amphipora have been called dendroid or twiglike, and aluacerids have been called subcylindrical, cylindrical, or columnar.
    • Further, older autozooids in major proximal regions of some large dendroid colonies stopped growing skeletons outwardly as distal colony growth continued.
nounˈdendroid
  • A graptolite of a type that formed much-branched colonies, found chiefly in the Ordovician and Silurian periods.

    Order Dendroidea, class Graptolithina

    Example sentencesExamples
    • In the Early Ordovician, many-branched planktonic forms developed from the attached dendroids.

Origin

Mid 19th century: from dendro- ‘tree’ + -oid.

 
 
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更新时间:2024/12/23 13:54:10